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The kidneys are responsible for converting 25-hydroxyvitamin D to 1,25-hydroxyvitamin D. This is the active form of vitamin D in the body. Kidney disease reduces 1,25-hydroxyvitamin D formation, leading to a deficiency of the effects of vitamin D. [1]
Vitamin D compounds, specifically cholecalciferol (D3) and ergocalciferol (D2), are used in rodenticides due to their ability to induce hypercalcemia, a condition characterized by elevated calcium levels in the blood. This overdose leads to organ failure and is pharmacologically similar to vitamin D's toxic effects in humans.
Finally, some effects of vitamin D occur too rapidly to be explained by its influence on gene transcription. For example, calcitriol triggers rapid calcium uptake (within 1-10 minutes) in a variety of cells. These non-genomic actions may involve membrane-bound receptors like PDIA3. [206] [207] [208]
“Vitamin supplements can have potentially very serious risks and side effects when taken in excess,” Stevens wrote. “Current food labeling requirements do not require these risks and side ...
Vitamins are essential for our health. Our bodies just cannot function without them. Although most of our vitamins are obtained from our diet, one-third of adults, and more than 50% of those over ...
Vitamin D (the inactive version) is mainly from two forms: vitamin D 3 and vitamin D 2. Vitamin D 3, or cholecalciferol, is formed in the skin after exposure to sunlight or ultra violet radiation or from D 3 supplements or fortified food sources. Vitamin D 2, or ergocalciferol, is obtained from D 2 supplements or fortified food sources. [3]